1303年山西洪洞8级地震高烈度区内地震活动特征及其物理意义
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摘要
定量处理了 130 3年山西洪洞 8级地震Ⅶ度范围内中小地震活动图象 ,根据其空间分布特征划分为 6个密集区 .在每一密集区内分析了 1970年以来ML2以上地震的时间分布特征 ,并结合密集区内历史地震情况 ,将地震活动分为 3种类型 .定性讨论了局部地壳介质状态与地震的关系 ,并解释了地震活动 3种类型的形成机制 ;提出了强震重复有限性的问题 ;探讨了山西地震带中长期尺度地震危险性和地震灾害多样性等问题 .
In this paper,we calculated the seismic pattern of instrumental recorded small and moderate earthquakes near the epicenter of the 1303 Hongtong M =8 earthquake,Shanxi Province. According to the spatial distribution of small and moderate earthquakes,6 seismic dense zones are delineated. Temporal distribution of M L≥2 earthquakes since 1970 in each seismic dense zone has been analyzed. Based on temporal distribution characteristics and historical earthquake activity,three types of seismicities are proposed. The relationship between seismic types and crustal medium is analyzed. The mechanism of three types is discussed. Finity of strong earthquake recurrence is proposed. Seismic hazard in mid-long term and diversity of earthquake disaster in Shanxi seismic belt are discussed.
In this paper,we calculated the seismic pattern of instrumental recorded small and moderate earthquakes near the epicenter of the 1303 Hongtong M =8 earthquake,Shanxi Province. According to the spatial distribution of small and moderate earthquakes,6 seismic dense zones are delineated. Temporal distribution of M L≥2 earthquakes since 1970 in each seismic dense zone has been analyzed. Based on temporal distribution characteristics and historical earthquake activity,three types of seismicities are proposed. The relationship between seismic types and crustal medium is analyzed. The mechanism of three types is discussed. Finity of strong earthquake recurrence is proposed. Seismic hazard in mid-long term and diversity of earthquake disaster in Shanxi seismic belt are discussed.
引文
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HaimsonBC .1974.Mechanicalbehaviorofrockundercyclicloading[A].InAdvancesinRockMechanics[C].Washington,DC :Na tionalAcademyofScience,2:373～378
SondergeldCH ,EsteyLH .1981.AcousticemissionstudyofmicrofracturingduringthecyclicloadingofWesterlygranite[J].JGeo physRes,86(B4):2915～2924
高阿甲.1999.1998年华北地区地震震源机制[J].地震地磁观测与研究,20(1A):75～81
高阿甲.2000.华北地区地震震源机制分析[J].地震地磁观测与研究,21(1A):53～59
黄雨蕊,高阿甲,许忠淮.1997.地震震源机制的研究应用于地震预报的探索[J].地震地磁观测与研究,18(1):52～57
焦远碧,吴开统,杨满栋.1990.我国地震台网监测能力及台网观测条件质量评定[J].中国地震,6(4):1～7
王健.1999.地震活动性震级结构及其在大陆强震机理研究和预测中的应用[D]:[学位论文].中国地震局地球物理研究所,1～120
王健.2001.地震活动性图象处理的网格点密集值计算方法[J].地震学报,23(3):262～267
HaimsonBC .1974.Mechanicalbehaviorofrockundercyclicloading[A].InAdvancesinRockMechanics[C].Washington,DC :Na tionalAcademyofScience,2:373～378
SondergeldCH ,EsteyLH .1981.AcousticemissionstudyofmicrofracturingduringthecyclicloadingofWesterlygranite[J].JGeo physRes,86(B4):2915～2924
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